Refactor routers directory (#15800)

* refactor routers directory

* move func used for web and api to common

* make corsHandler a function to prohibit side efects

* rm unused func

Co-authored-by: 6543 <6543@obermui.de>

routers/web/explore/org.go

@@ -0,0 +1,39 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package explore
+
+import (
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/structs"
+)
+
+const (
+	// tplExploreOrganizations explore organizations page template
+	tplExploreOrganizations base.TplName = "explore/organizations"
+)
+
+// Organizations render explore organizations page
+func Organizations(ctx *context.Context) {
+	ctx.Data["UsersIsDisabled"] = setting.Service.Explore.DisableUsersPage
+	ctx.Data["Title"] = ctx.Tr("explore")
+	ctx.Data["PageIsExplore"] = true
+	ctx.Data["PageIsExploreOrganizations"] = true
+	ctx.Data["IsRepoIndexerEnabled"] = setting.Indexer.RepoIndexerEnabled
+
+	visibleTypes := []structs.VisibleType{structs.VisibleTypePublic}
+	if ctx.User != nil {
+		visibleTypes = append(visibleTypes, structs.VisibleTypeLimited, structs.VisibleTypePrivate)
+	}
+
+	RenderUserSearch(ctx, &models.SearchUserOptions{
+		Actor:       ctx.User,
+		Type:        models.UserTypeOrganization,
+		ListOptions: models.ListOptions{PageSize: setting.UI.ExplorePagingNum},
+		Visible:     visibleTypes,
+	}, tplExploreOrganizations)
+}